Computing device.



W. J. RAINBY.

COMPUTING IQEVIGE. APPLICATION FILED Hmm, 1909.4

956,998. Patented May 3, 1910.

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UNITED sTATEs PATENT oEEicE.

WILLIAM J. RAINEY, OF GROVE CITY, PENNSYLVANIA.

COMPUTING DEVICE.

To all 'whom it may concern:

Be it known that I, VILLIAM J. RAINEY, citizen of the United States,residing at Grove City, county of Mercer, and State of Pennsylvania,have invented certain new and useful Improvements in Computing Devices,of which the following is a specification.

This invention relates to computing devices and refers particularly to adevice for indicating the relative sizes of drills to the taps required,so that a ready means may be employed for determining` the size of thedrill required to bore the desired tap.

The invention comprises a simple and novel device which is inexpensiveand one which is easily operated by means of which relative sizes may bereadily computed and which may be applicable to any art in which suchcomputing 1s necessary.

The invention has for an object the provision of a computing device ofthis character which is of simple structure so that the saine may bereadily carried within the pocket of workmen and thereby form aconvenient and handy implement of this nature.

For a full understanding of the invention reference is to be had to thefollowing description and accompanying` drawings, in which Figure 1 is aperspective view of the complete computator, and F ig. 2 is alongitudinal section through the same.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawing by the samereference characters.

Referring to the drawing in which is disclosed an embodiment of theinvention the reference numeral 10 designates a. cylinder which isprovided in one of its sides with elongated openings 11 and 12 which aredisposed in registered relation and which are closed by the employmentof a portion of transparent material 18 such as isinglass or the like inorder to form a means by which the operator may easily see through theopenings 11 and 12 to read configurations which are dis osed upon theouter face of a drum 14 which is rotatably mounted within the cylinder10. The drum 14 preferably comprises a cylindrical block which is ofsuch size as to fit loosely within the cylinder 10 and to thereby freelyrotate therein, the block 14 being retained in concentric relationwithin the cylinder 10 by Specification of Letters Patent.

Applcationiled June 9, 1909.

Patented May 3, 1910.

Serial No. 501,083.

the employment of a set-screw 15 which is loosely positioned through theclosed end of the cylinder 10 and rigidly engaged within the inner endof the drum or block 14.

The drinn 14 is rotated by means of a cap 16 which is rigidly secured tothe outer end of the drum by the employment of a pin 17 which isprovided with a rectangular shank in order to engage the cap 16 in rigidrelation upon the end of the drum 14 to thereby cause the rotation ofthe drum upon the rotation of the cap 16. The cap 16 is also positionedupon the drum 14 and is of such size as to extend the flanged portionthereof over the outer edge of the cylinder 10 and to therebyfrictionally close the cylinder and to form a ready means by which thecap may be grasped for rotation. The outer face of the cap 16 ispreferably milled or corrugated for the purpose of forming a roughenedlinger engaging portion by means of which the operator may secure a firmgrasp therewith.

The drum 14 is provided adjacent its op posite ends with configurationswhich are disposed in columns extending peripherally around the drum,the separate configurations of each column being oppositely disposed inlongitudinal alinement upon the drum so that the same willsimultaneously register with the openings 11 and 12 to enable theoperator to read the same in one reading, in which instance the opening11 will indicate the readings to designate the taps and for forming tapsof the size which are indicated by the configurations which registerwith the opening 11 while the coniigurations which register with theopening 12 make the size of the drills which must be employed forforming the bores of the corresponding sizes of taps which aresimultaneously indicated in registered relation with the opening 1l.

In employing the device it is readily ob served that the configurationsmay be employed for various purposes other than the relative size oftaps and drills and that the device will be equally useful indetermining quickly such computations.

Having thus described the invention what is claimed as new is 1. Acomputing device including a hola drum located in said cylinder andadapted for rotation therein, said drum bearing columns of numerals forregistration with the openings, a set-screw loosely carried through theclosed end of said cylinder and engaged with said drum for retaining thesame in position, a cap engaged over the open end of said cylinder andsecured against the end of said drum, and a pin of angular crosssectionsecured through said cap and into the end of said drum.

2. A computing device including a hollow cylinder closed at one end andhaving open ings in one side thereof, a drum rotatably positioned Withinsaid cylinder and hearing configurations thereon for registration withthe openings in said cylinder, a set-screw secured through the closedend of said cylinder and with said drum, and a cap secured upon one endof said drum Jfor engagement over the open end of said cylinder torotate said drum.

3. A computing device including a cylindrical member having openings inone side thereof, a drum rotatably positioned Within said cylinder, anda cap secured to said drum for engagement over one end of said cylinderto rotate said drum.

4. A computing device including a cylinder having openings inv one sidethereof, a drum having corresponding characters located in columns uponthe periphery thereof for registration With the openings in saidcylinder, and a cap carried by said drum and rictionally engaged overthe open end of said cylinder to rotate said drum.

5. A computing device including a cylinder having openings formed in oneside thereof and in longitudinal alinement, a drum located in saidcylinder and adapted to rotate therein, said drum having correspondingcolumns of congurations for simultaneous registration With the openingsin said cylinder, a cap carried upon one end or' said drum and engagedover the open end or' said cylinder to rictionally retain said drum inadjusted position, and a set-screw engaged through the opposite end ofsaid cylinder and into said drum for retaining the same Within thecylinder.

ln testimony whereof l atliX my signature in presence of two Witnesses.

VLLAM J. RAINEY. [n s] Witnesses G. E. HrNoI-ICLIFFE, JAS. RICHARDSON.

